The cancer itself may also damage nerves involved in having an erection.

What is the treatment for impotence?
Talk to your doctor about options for treating impotence. Depending on your circumstances, your doctor may recommend hormone replacement, medication or exercises.

Hormone replacement therapy (HRT): HRT may be an option if your cancer is not hormone-related, such as prostate or testicular cancer. Your doctor may refer you to an endocrinologist who can administer hormone patches and/or testosterone replacement.

Drug therapy: In recent years, several drugs have been developed that inhibit an enzyme to help you maintain an erection. These include sildafenil (Viagara®), tadalafil (Cialis®), and vardenafil (Levitra®).

Exercises: The Kegel exercise focuses on improving circulation and strengthening muscles that are used for intercourse. This exercise involves contracting the muscle that control urination and attempting to hold each contraction for at least 10 seconds, then releasing. Do these exercises as directed by your doctor, or 3-5 times per day, 5-10 contractions each time.